Site investigation · Laboratory: soil classification

Moisture, density & phase relations calculator

Bulk and dry density, void ratio, porosity, saturation and field density ratio, with a three-phase diagram.

Standard: AS 1289.2.1.1 · 5.3.1 sand replacement · 5.8.1 nuclear

Open the live calculator → All site investigation calculators

Inputs in the worked example

The live calculator starts with these values; change any of them and every result, check and diagram updates instantly.

InputValueUnit
Wet mass of soil2150g
Volume of hole / mould1080cm³
Moisture content13.5%
Gs2.68
Lab MDD1.86t/m³

Worked example — results

ResultValueUnit
Bulk density ρ1.991t/m³
Dry density ρd1.754t/m³
Unit weight γ / γd19.5 / 17.2kN/m³
Void ratio e0.528
Porosity n34.6%
Degree of saturation S69%
Saturated density2.099t/m³
Density ratio ρd / MDD94.3%
Air10.9 %Water23.7 %Solids65.4 %e = 0.528n = 34.6 %S = 69 %ρd = 1.754 t/m³
Diagram for the worked example

Method, formulas and assumptions

Related site investigation calculators

For preliminary design and education. Check every result against the current standard and your own engineering judgement before use.